Year	Percent
1950	10.31275
1955	11.53975
1960	10.83249
1965	10.10914
1970	10.7219
1975	10.99589
1980	12.87843
1985	10.09691
1990	9.48695
1995	8.79458
2000	8.66457
2005	7.90466
2010	6.52237
2015	6.19126
2020	6.68244
2025	6.14655
2030	5.75261
2035	5.5295
2040	5.4968
2045	5.4978
2050	5.39874
2055	5.25711
2060	5.06966
2065	4.93906
2070	4.84884
2075	4.76003
2080	4.64582
2085	4.51577
2090	4.38725
2095	4.2799
2100	4.22576